• Title/Summary/Keyword: geological survey

Search Result 626, Processing Time 0.024 seconds

Suggestion of Regression Equations for Estimating RMR Factor Rating by Geological Condition (지질 조건을 고려한 RMR 인자값 추정을 위한 선형회귀식 제안)

  • Kim, Kwang-Yeom;Yim, Sung-Bin;Kim, Sung-Kwon;Kim, Chang-Yong;Seo, Yong-Seok
    • The Journal of Engineering Geology
    • /
    • v.17 no.4
    • /
    • pp.555-566
    • /
    • 2007

  • In general, RMR classification system is used for the support design of a tunnel. Face mapping during excavation and RMR-based rock classifications are conducted in order to provide information for complementary changes to preliminary survey plans and for continuous geological estimations in direction of tunnel route. Although they are ever so important, there are not enough time for survey in general and sometimes even face mapping is not available. Linear regression analysis for the estimation of mediating RQD and condition of discontinuities, which require longer time and more detailed observation in RMR, was performed and optimum regression equations are suggest as the result. The geological data collected from tunnels were analyzed in accordance with three rock types as sedimentary rock, phyllite and granite to see geological effects, generally not been considered in previous researches. Parameters for the regression analysis were set another RMR factor.

  • PDF KSCI

Geology and Geological Structure around Harar, NE Ethiopia (에티오피아 북동부 하라르 일대의 지질과 지질구조)

  • Ryoo, Chung-Ryul;Heo, Cheol-Ho;Yang, Seok-Jun;Alemu, Tadesse
    • The Journal of the Petrological Society of Korea
    • /
    • v.24 no.2
    • /
    • pp.65-75
    • /
    • 2015

  • Around Harar in the northeastern part of the Ethiopia, the Precambrian granitic gneiss and gabbro bodies are developed with several pegmatites. The rock bodies in this area have been deformed by ductile and brittle deformations developing fold and ductile shear structure, and thrust and fault.

  • https://doi.org/10.7854/JPSK.2015.24.2.65 인용 PDF KSCI

Geological feasibility and slope stability analysis under GIS environment for rail route alignment

  • Jain, Kamal;Kumar, Anand
    • Proceedings of the KSRS Conference
    • /
    • 2003.11a
    • /
    • pp.186-188
    • /
    • 2003

  • Rail Route Alignment in hilly terrain is a difficult task to implement as several natural constraints poses threat to the safety and stability of the alignment. The conventional methods followed to find out the final location survey or the feasibility analysis for alignment is time taking consuming. Some times, due to inaccessibility of the terrain it becomes impossible to carry out such works. The construction works in hilly terrain, which are associated with the proposed alignment, are not same as carried out in plane areas due to a vast contrast between the two areas. Different geological structures such as faults, thrusts, synclines and anticlines are a big problem to carry out normal construction practices. Thus for a safe and stable railway route in the unstable hilly areas, it is required to carry out the feasibility analysis of the proposed alignment to assist the policy makers for a successful implementation of the alignment. In the present work Remote Sensing and GIS has been successfully used to carry out geological feasibility and slope stability analysis for rail route alignment work.

  • PDF